Steel slag stress absorption layer material and preparation method thereof

Abstract

The invention discloses a steel slag stress absorption layer material and a preparation method thereof. The method comprises the following steps of: (1) respectively weighing 7-14 parts by weight of mineral powder, 100-200 parts by weight of steel slag aggregate, 9-19 parts by weight of SBS modified asphalt and 0-0.4 parts by weight of brucite mineral fibers; (2) heating the aggregate and the mineral powder at a constant temperature of 170-180 DEG C for more than 4 hours for later use; (3) heating the SBS modified asphalt to 170-180 DEG C, and fully and uniformly stirring for later use; and (4) carrying out dry mixing on the steel slag aggregate subjected to constant-temperature heating for 25-35 seconds, then adding brucite mineral fibers, carrying out dry mixing for 8-12 seconds, then adding the heated SBS modified asphalt, carrying out wet mixing for 85-95 seconds, and finally adding mineral powder, and carrying out mixing for 15-25 seconds. The stress absorption layer material manufactured by the method is high in viscoelasticity and good in fatigue cracking resistance. The preparation method is simple in process, economical and environment-friendly, and has important practicalsignificance and economic value.

Description

technical field [0001] The invention relates to the field of asphalt pavement material preparation, in particular to a steel slag stress absorbing layer material and a preparation method thereof, which are used between cement concrete pavement and asphalt overlay. Background technique [0002] Regardless of the new asphalt pavement or the asphalt pavement on the old road, under the interaction of temperature and traffic load, the micro-cracks will continue to expand, and stress concentration will easily occur at the bottom of the asphalt pavement, and the cracks will expand to the asphalt pavement, thus forming reflection cracks. [0003] The existence of reflective cracks, on the one hand, will destroy the integrity and continuity of the pavement, affecting the use quality of the pavement and the appearance of the road surface; Entering the base and roadbed greatly weakens the strength and stiffness of the roadbed and seriously affects the performance of the road surface. ...

AI Technical Summary

Problems solved by technology

[0003] The existence of reflective cracks, on the one hand, will destroy the integrity and continuity of the pavement, affecting the use quality of the pavement and the appearance of the road surface; Entering the base and roadbed greatly weakens the strength and stiffness of the roadbed and seriously affects the performance of the road surface

[0004] In addition, with the rapid development of road and urban road construction in our country, the demand for road materials is increasing year by year, and the demand for natural aggregates such as basalt is huge every year, but the existing resource reserves are limited, and many areas have banned mining due to environmental protection policies.

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